I tried to install your module and wanted to report the following error. Here are my system specs (didn't know if maybe language settings had something to with the 'Monday' mentioned in the ParseError so I included them):
Traceback (most recent call last):
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 638, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 675, in dispatch
result = self._call_function(**self.params)
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 331, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/home/odoo/odoo-dev/odoo/odoo/service/model.py", line 119, in wrapper
return f(dbname, *args, **kwargs)
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 324, in checked_call
result = self.endpoint(*a, **kw)
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 933, in __call__
return self.method(*args, **kw)
File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 504, in response_wrap
response = f(*args, **kw)
File "/home/odoo/odoo-dev/odoo/addons/web/controllers/main.py", line 882, in call_button
action = self._call_kw(model, method, args, {})
File "/home/odoo/odoo-dev/odoo/addons/web/controllers/main.py", line 870, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/home/odoo/odoo-dev/odoo/odoo/api.py", line 681, in call_kw
return call_kw_multi(method, model, args, kwargs)
File "/home/odoo/odoo-dev/odoo/odoo/api.py", line 672, in call_kw_multi
result = method(recs, *args, **kwargs)
File "/home/odoo/odoo-dev/odoo/odoo/addons/base/module/module.py", line 410, in button_immediate_install
return self._button_immediate_function(type(self).button_install)
File "/home/odoo/odoo-dev/odoo/odoo/addons/base/module/module.py", line 484, in _button_immediate_function
modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "/home/odoo/odoo-dev/odoo/odoo/modules/registry.py", line 78, in new
odoo.modules.load_modules(registry._db, force_demo, status, update_module)
File "/home/odoo/odoo-dev/odoo/odoo/modules/loading.py", line 339, in load_modules
loaded_modules, update_module)
File "/home/odoo/odoo-dev/odoo/odoo/modules/loading.py", line 237, in load_marked_modules
loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
File "/home/odoo/odoo-dev/odoo/odoo/modules/loading.py", line 159, in load_module_graph
_load_data(cr, module_name, idref, mode, kind='demo')
File "/home/odoo/odoo-dev/odoo/odoo/modules/loading.py", line 95, in _load_data
tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
File "/home/odoo/odoo-dev/odoo/odoo/tools/convert.py", line 848, in convert_file
convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
File "/home/odoo/odoo-dev/odoo/odoo/tools/convert.py", line 918, in convert_xml_import
obj.parse(doc.getroot(), mode=mode)
File "/home/odoo/odoo-dev/odoo/odoo/tools/convert.py", line 799, in parse
self.parse(rec, mode)
File "/home/odoo/odoo-dev/odoo/odoo/tools/convert.py", line 802, in parse
self._tags[rec.tag](rec, de, mode=mode)
File "/home/odoo/odoo-dev/odoo/odoo/tools/convert.py", line 710, in _tag_record
id = self.env(context=rec_context)['ir.model.data']._update(rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode)
File "/home/odoo/odoo-dev/odoo/odoo/addons/base/ir/ir_model.py", line 1196, in _update
record = record.create(values)
File "/home/odoo/odoo-dev/openeducat/openeducat_timetable/models/timetable.py", line 104, in create
res = super(OpSession, self).create(values)
File "/home/odoo/odoo-dev/odoo/addons/mail/models/mail_thread.py", line 228, in create
thread = super(MailThread, self).create(values)
File "/home/odoo/odoo-dev/odoo/odoo/models.py", line 3821, in create
record = self.browse(self._create(old_vals))
File "/home/odoo/odoo-dev/odoo/odoo/models.py", line 3901, in _create
self._check_selection_field_value(name, val)
File "/home/odoo/odoo-dev/odoo/odoo/models.py", line 2116, in _check_selection_field_value
field.convert_to_cache(value, self)
File "/home/odoo/odoo-dev/odoo/odoo/fields.py", line 1738, in convert_to_cache
raise ValueError("Wrong value for %s: %r" % (self, value))
ParseError: "Wrong value for op.session.type: 'Monday'" while parsing /home/odoo/odoo-dev/openeducat/openeducat_timetable/demo/op_timetable_demo.xml:5, near
<record id="op_session_1" model="op.session">
<field name="timing_id" ref="op_timing_1"/>
<field name="faculty_id" ref="openeducat_core.op_faculty_1"/>
<field name="course_id" ref="openeducat_core.op_course_2"/>
<field name="batch_id" ref="openeducat_core.op_batch_1"/>
<field name="subject_id" ref="openeducat_core.op_subject_6"/>
<field name="start_datetime" eval="time.strftime('%Y-%m-%d 04:30:00')"/>
<field name="end_datetime" eval="time.strftime('%Y-%m-%d 05:30:00')"/>
<field name="type">Monday</field>
</record>
After reloading my app list, it looks like this, with both OpenEduCat Timetable and ERP lacking the "installed" status: